There are some small mistakes I noticed. Try to use different transitions and vocab every time if possible as avoid being too repetitive
According to data, the figures for inhabitants in marriage are considerably higher than
that of the single person's statistics.
Looking at more detail
"Looking
in more detail [singular]", .....
"Looking
into more detailS", .....
Looking at more detail, family with children under 18 year-old is recorded as the happiest person
s at 44%.
Then the couple with above-18-year-old children comes behind at 41%, making it by far the lowest rate among others.
Try to use different transitions
Followed by, the couple with above-18-year-old children comes behind at 41%, making it by far the lowest rate among others.